高温长时使用隔热材料热导率评价  

Evaluation of thermal conductivity of insulation materials at high-temperature for longtime

作　　者：杨景兴[1] 何凤梅[1] 陈聪慧[1] 李琦[1] 于帆[2] 杨海龙[1] 

机构地区：[1]航天材料及工艺研究所先进功能复合材料技术重点实验室,北京100076 [2]北京科技大学机械工程学院,北京100083

出　　处：《复合材料学报》2013年第S1期279-282,共4页Acta Materiae Compositae Sinica

摘　　要：为研究隔热材料在高温下长时使用中所发生的吸放热变化对其热参数的影响,本文利用非稳态阶跃式平面热源法对两种隔热材料进行了高温热导率研究,并获得了高温长时使用下材料的热导率、热扩散率以及体积比热数据。结果表明,隔热材料在高温长时使用中,可能伴随着吸放热过程,导致材料的隔热性能发生动态变化,这种动态变化可以通过测量其热导率等热参数反应出来。In order to research the effect of endothermic and exothermic processes on thermal parameters of the insulation materials under high temperature and long time,the high-temperature thermal conductivity measuring of two thermal insulation materials has been investigated by plane source-stepwise transient method in this paper.The thermal conductivity,diffusivity and capacity values of two materials at high-temperature for longtime have been obtained.The results showed that,insulation materials might also be accompanied by endothermic and exothermic processes under high-temperature and long-term,and heat insulation performance of the material will change.These processes could be responded by thermal conductivity measuring.

关 键 词：隔热材料 高温 长时使用 非稳态平面热源法 热导率 

分 类 号：V259[一般工业技术—材料科学与工程]